Bruno Lowagie (iText) wrote:
> 
> 
>>That is: if you're talking about a Text field.
>>What you say isn't true for a Button field.
>>Suppose you want to replace the icon on a button field,
>>than you have to getNewPushbuttonFromField() and
>>replacePushbuttonField() as is done in this example:
>>http://itextpdf.com/examples/iia.php?id=156
> 
>>Why do you need to copy the field, throw away the
>>original field and then add the copied field?
>>Because there's more to a button than just a /V value.
> 

I see what you mean there.  That makes sense.


Bruno Lowagie (iText) wrote:
> 
>>As replacing a button is a more common request than
>>replacing a signature field, convenience methods were
>>added to iText. There are no such convenience methods
>>(yet) to "empty" a signature field.
> 

Makes sense.  I would think that clearing a digital signature field would be
more of a common request than replacing a button though.  That's just me I
guess...


Bruno Lowagie (iText) wrote:
> 
> I should check ISO-32000 to see what keys are
> important in the signature dictionary.
> Did you look inside the PDF? Aren't there any other
> keys (other than /V and /AP) left in the signature
> dictionary? And also: if you remove the /AP value,
> you throw away the visual appearance of the signature,
> won't that be a problem?
> 

There are other keys in the signature dictionary.  For example in the values
section the keys are:

/AP
/P
/FT
/MK
/F
/T
/Subtype
/V
/Type
/Rect


I would think it would be a problem, but again as I stated in the other
thread, that's the only code I've found that has anything to do with what
I'm trying to accomplish.  I think it was Paulo who actually suggested
deleting the /V and /AP values from the field in the thread I reference
before.
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